Attachment for printing-presses.



R. ADAMS.

ATTACHMENT FOR PRINTING PRESSES."

APPLICATION FILED APR. T" I916.

' Patented Aug. 13, 1918.

2 SHEETS-SHEET I.

HTTORIIEY R.ADAMS'. ATTACHMENT FOR PRINTING PRESSES.

APPLICATION FILED APR. 7. I916. I Patented Aug. 13, 1918.

2 SHEETS-SHEET 2- lmlillllmlml I J 6 04.1mm. wnsmm: mm o. c.

nnrrn sr a an :o'; annm: s; r1 A an E a, M 1o H was .1 I p To all whom.itmaytoncern:

Be it known that**I, REED AnnMsg a c1't1- zen of the United "States, residing; at Lapcer,

county of Lapeer; State of Michigang have invented a certain newfand usefuldhnlarove ment in Attachments for Printing-Presses, and declare the following to be full, clear, and exact description of the same; such as will enable others skilledin the art to which it pertains to make and use the same reference being had to the accompanying draw ings, which form apart ofthis specification: 9

This invention relates to attachments for printing presses whereby letters canbe printed upon a printing; press so they liave theappearance of a typewrittenletter.

The attachments include an auto1i1atically-- shiftable ribbon which -is impressed on "the j paper to print inthe same way that a ty pe writer prints. "This ribbon is carried upon a pair of spools and means is provided for steadying the spools'wlien the ribbonisfbeing shifted.

A protecting layer of material or frisket sheet is stretched from gripper bar togrip per bar to avoid smudging of the paper by the ribbon. These features will more fully appear in the specification following.

In the drawings,

Figure 1 is aside elevation of a Gordon press, showing my attachments in place.

Fig. 2 is an enlarged detail of the platen and the ribbon and its carriers, the same being an end View,

Fig. 3 is a front elevation of the ribbon and its carriers together with the gripper bars and the gripper bar-carrier.

Fig. 4 is a top or plan view of the platen,

the ribbon and its carriers- Fig. 5 is a detailshowing the pawl and ratchet on the top of one of the spools.

Fig. 6 is a top view partly in section of the v same parts.

Fig. 7 is a perspective detail of the gripper bars and the frisket sheet showing howthe same is fitted on to the gripper bars.

The printing press shown is of the type known as the Gordon press.

. a is the inking plate; b the frame into which the type or printing block is locked; 0 the platen; d the tympan. The platen and the tympan oscillate back and forth to bring the surface to be printed in contact with the printing block. Inasmuch as this can be accomplished in various ways. it need not be here detailed.

this pawl maybe i A TAW E T. F B remains-renews Patented 13,

Application filedlApril 7, 1916. wserial No. 89,513.

The gripper frame 6 ispivotedatuf. (see Fig. to the platen .0 .lThe lower endwis provided withfa follower enda pair ofuprightswh havin upstanding spindles are riveted or boltedi These spindles rotatably support the long ribbon spools 2' which carry the inking character is similar tothe typewriter ribbon. Each of these spools carries at its top a ratchet wheel having teeth" onu itsisiden 7a is a sleevefixed to the top offithe.spii idle h. leis a I sleeve rotatable: about wtheUsleeve 7r: bu t whose rotation? is 3 limited at: one end by the stop pin m and? at the opposite end by I the spring 77,; elp' 1 is ra swinging :pawl carrier-pivoted at its opposite sides of! the rotating sleeve 1 1 On its fend is pivoted the pawlyos s l The full line position of the pawl 0 inFig. fiiisfthelopera tive positions The i dotted line position. is the inoperative position. I

pawl must bethro-wn out when the other is put into engagement with the ratchet teeth.

Fig, 3. Each of the pawl carriers is struck customary way. Ience the pawl carrier on each spool is operated at each time but onlyone pawl being in en gageinent with the ratchet teeth, only one spool is operated. Hence the ribbon is made to shift one way by the operation of one pawl and the connected spool. When the ribbon has been nearly wound on this spool,

and the other pawl to shift the ribbon in the opposite direction on tothe oppositespool. pi

g, g are the customary gripper bars adjustable as to spacing along the gripperframe 9". When the form is first locked up a sheetpreferably of paper-board is inserted on the tympan and one impression made This is then taken out and the impressionscut out as shown at t, forming the Rectangularpaper bands 10 frisket "sheet.

may be pasted sheet at the top gripper bars as shown inFigs. 7 and 3. The bottom of the frisket sheet is pinched to the back of the frisket in between the grippers and the gripper carrier. This frisket sheet affords a protection between the ribbon of the sheet of paper to be printed upon so This is indicated in and these slipped over the PATENT ornio.

rollvg and at; 1 each bifurcated: end to the Each of the $130018? lS PIOVIdGCl with a ratchet and pawl of-this character. One

manually disconnected rotated with the ratchet the slotted barof i and the main body.

v is to be made.

- platen come together,

that the paper will not be smudged by the ribbon at the places where no type is intended to make impressions upon it. I

With the long upstanding spindles it is not possibleto make the spools absolutely rigid at the top, and to insure that the spools will be held absolutely rigid while the ribbon is being shifted, I employ a pair of forks 'v,one on each end of the jointed frame 10 which holds the tympan to the platen." When the gripper'frame and the and before the pawl is engaging the ratchet wheel, these forks straddle the shanks of the screws a: on the topsof the spindles and thereby securely I space the spools and holdthemrigid so the ribbon willwind on the spools one convolu- 7 tion in accurate registrywith the next below.

each other, a

What I Zelaim is:

V 1. The combination of a printing block, ,a platen, the two being movable relative to shiftable ribbon between the two 2andra. frisket sheet mounted between the ribbon and the paper to .be printed upon to prevent the ribbon smudging the :paper at places on the paper where no impression 2;"The combination of a printing block, a

'Gopies ofthis patent may be obtained forfive cents each, vby addressing the of a printing block, a platen, a palr of upstanding spindles at the ends of the platen and the block, ribbon spools rotatably mounted on the same, a shifting ribbon winding on the spools, and means for engaging the spindles when the ribbon is shifted to hold the spools in rigid position.

4. The combination of a printing block, a platen, the two being movable relative to each other, a pair of upstanding spindles, ribbon spools carried on the same, :a shifting ribbon winding on the ends of the platen for straddling the spindle tops when the ribbon is being shifted.

In testimony whereof, I sign this specification.

REED ADAMS.

Commissioner of Patents,

Washington, I). G.

on the spools, and forks 

